Cleaning a Fujitsu Halcyon DC inverter indoor unit begins by disconnecting power to the system at the main breaker for safety. Next, gently lift the front plastic intake grille and slide out the reusable mesh air filters, washing them thoroughly with warm water and mild soap before letting them dry completely. For the accessible evaporator coils and internal plastic louvers, spray a specialized no-rinse coil cleaner designed for mini-splits, allowing the solution to foam up and dissolve accumulated dust and biological residue. Finally, ensure the condensate drain trough is flowing freely, reinsert the dry filters, and close the front panel securely.
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